Why Merino
Wool Apparel?

We believe that adventures come in layers.

That you can enjoy everything from summiting new mountains to sipping a beverage at the base.

All it takes is the right gear.

Merino wool is pretty magical. This sustainable, natural performance fiber helps fuel adventures in more ways than we could have imagined when we started making socks over 20 years ago.

After figuring out that it was so beneficial in socks, we started making Merino wool apparel designed to enable everything from backcountry skiing to multi-week treks to high-intensity training. We think that Merino wool clothing is key to staying comfortable in the outdoors.

Layers Matter

We design from the inside out.

That means we put Merino where it matters—next to skin. We also focus on using low-profile, non-chafing, strategically placed seams to maximize comfort. And we dial in our fits for end-use performance and comfort. This helps us create performance Merino wool apparel that is just as comfortable as it is efficient. And it helps you stay focused for every lap, summit, and powder turn.

1st Layer

Merino 250

Build Your Base

This is our core base layer fabric. The Merino 250 is the #1 base layer on the market, thanks to its warmth, softness, and fit. This collection of base layers and Merino wool apparel is ideal for cold-weather activities where warmth and breathability are crucial. Its 100% Merino wool construction moves moisture away from the skin while it’s still in a vapor state, helping to keep you warm, dry, and stink-free all day long.

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Slim Fit

form-fitting for maximum Merino contact

Regular Fit

leaves extra room for additional movement

Sustainable Wool

sourced through ZQ-certified farms

Merino 150

Your Layer for Everything

This lightweight collection of Merino wool clothing is perfect for four-season layering and everyday comfort. Available in a variety of fits and designs, it offers maximum versatility. From our comfortable underwear to our stylish, lightweight hoodies and beyond, it transcends seasonality to create a layer that can be worn in warmer months or combined with other layers in colder months.

Slim Fit

form-fitting for maximum Merino contact

Core Spun Technology

Our Core Spun Merino wool technology beefs up garment durability without sacrificing next-to-skin comfort by wrapping high-quality, super-soft Merino around a nylon core for every thread in our 150 fabric.

Sustainable Wool

sourced through ZQ-certified farms

PhD® Apparel

Merino That Moves

PhD® Merino wool apparel is our most performance-driven collection of clothing. It combines ultra-soft Merino wool, lightweight polyester fiber blends, body-mapped vents, and reflective elements to enhance sweat management, dry times, durability, and visibility. It’s the best of both worlds.

Available in light (250g) and ultra light (150g)

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2nd Layer

Smartloft

Technical, comfortable, breathable insulation

We blend 50% recycled Merino wool, 38% virgin wool, and 12% polyester to create high-quality performance insulation that we use in all of our Smartloft products. When worn with our Merino base layers, it creates an efficient sweat transportation system that will help you stay comfortable as you enjoy your cold-weather adventures. The result is layers you don’t have to shed.

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60G
Our lightest insulation

perfect for cool-weather performance

120G
Midweight insulation

good for layering and high-output activities.

150G
Warmer insulation

great for cool- to cold-weather days.

180G
Our warmest insulation

ideal for cold-weather layering.

Recycled Fleeces

Cozy. Refined. Recycled.

Our Recycled Fleece uses reclaimed wool that has been collected, shredded, and re-spun to create a more sustainable wool product that you can feel good about wearing on the trail, in the office, and anywhere else your adventures might take you.

Sweaters

Created for warmth and comfort in cool to cold weather, our sweaters combine the breathability, temperature regulation, and odor control advantages of Merino with everyday layering. They’re styled to be classic and follow seasonal trends while always offering all-day comfort.

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